Карта знаний PHP — bonsai-2:27b, run-18 · think: off

{"answer": "no", "explanation": "Single-quoted strings are not processed identically to double-quoted strings, as the latter supports variable interpolation and escape sequences while the former generally does not."}

{"answer": "yes", "explanation": "The null coalescing operator (??) is designed to avoid undefined variable warnings by checking if a variable is defined and not null, returning the right operand otherwise."}

{"answer": "ab", "explanation": "The comma operator concatenates the two string arguments, producing 'ab'."}

{"answer": "no", "explanation": "The print statement in PHP returns the value 1, but it is a language construct (a statement) rather than a function, so it cannot be used directly inside expressions."}

{"answer": "no", "explanation": "The Elvis operator returns its right operand when the left operand is falsy, and returns the left operand itself when it is truthy."}

{ ⏎   "answer": "no", ⏎   "explanation": "In PHP, the concatenation operator (.) has lower precedence than the arithmetic operators like addition and subtraction, so the statement is true." ⏎ }

```json ⏎ { ⏎   "answer": "no", ⏎   "explanation": "In PHP, the exponentiation operator is right-associative, so 2 ** 3 ** 2 is evaluated as 2 ** (3 ** 2), which equals 2 ** 9, or 512, not 64." ⏎ } ⏎ ```

{"answer": "sum: 3", "explanation": "Due to operator precedence, the concatenation operator (.) binds tighter than the addition operator (+), so PHP evaluates it as ('sum: ' . 2) + 3, which converts 'sum: 2' to 0, resulting in 3."}

```json ⏎ { ⏎   "answer": "no", ⏎   "explanation": "Strict comparison of arrays requires identical keys and values in the same order." ⏎ } ⏎ ```

{ ⏎   "answer": "no", ⏎   "explanation": "The equality operator (==) performs a loose comparison, so 0 == false returns true, not false." ⏎ }

{"answer": "yes", "explanation": "In PHP 8, non-numeric strings are converted to 0 in loose equality comparisons, so \"abc\" == 0 returns true."}

{"answer": "yes", "explanation": "In PHP, the loose equality operator (==) returns true when null is compared to 0, '', or false because they are all considered equivalent in this context."}

{ ⏎   "answer": 42, ⏎   "explanation": "In PHP, casting the string '42abc' to int extracts the leading numeric part '42' before the first non-numeric character." ⏎ }

{ ⏎   "answer": 10, ⏎   "explanation": "PHP coerces the string '5' to the integer 5 and adds 5, resulting in 10." ⏎ }

{ ⏎   "answer": "yes", ⏎   "explanation": "In PHP, the boolean value false is explicitly cast to the integer 0, and then to the string \"0\" when converted to a string." ⏎ }

{ ⏎   "answer": "yes", ⏎   "explanation": "Due to floating-point precision issues, 0.1 + 0.2 results in 0.30000000000000004, so the strict comparison with 0.3 is false." ⏎ }

{"answer": "no", "explanation": "strrev() operates on bytes, so it corrupts multi-byte UTF-8 characters by reversing their byte sequences instead of the logical characters."}

{"answer": "yes", "explanation": "The str_contains function correctly returns true because the substring 'world' is present within the string 'Hello world'."}

{"answer": "no", "explanation": "str_pad() can pad a string on either the right or the left side using its second parameter."}

{"answer": "yes", "explanation": "The default character set for trim() is indeed only the space character, meaning it does not remove other whitespace like tabs or newlines without explicitly specifying them."}

{"answer": 6, "explanation": "The character 'h', 'l', 'l', 'o' are each 1 byte (4 bytes), and 'é' in UTF-8 is encoded as 2 bytes, totaling 6 bytes."}

{"answer": "def", "explanation": "The second argument -3 starts the substring 3 characters from the end of the string 'abcdef'."}

{ ⏎   "answer": "no", ⏎   "explanation": "ucfirst() returns a modified copy of the string and does not modify the original variable in place." ⏎ }

{ ⏎   "answer": "yes", ⏎   "explanation": "Variable interpolation occurs in heredoc syntax, but not in nowdoc syntax." ⏎ }

{"answer": "no", "explanation": "The sort() function reindexes the array keys from 0 to n-1, so it does not preserve the original key-to-value associations (as ksort() and uasort() do)."}

{"answer": "yes", "explanation": "In PHP, numeric strings that can be cast to integers or floats are automatically converted to their numeric counterparts when used as array keys."}

{ ⏎   "answer": "no", ⏎   "explanation": "The third parameter $strict in in_array() defaults to false, meaning it uses a loose comparison (==) by default." ⏎ }

{"answer": "yes", "explanation": "By default, array_filter() removes elements where the value is considered falsy, such as 0, '0', '', null, or false."}

{"answer": "yes", "explanation": "By default, the preserve_keys argument is set to true, which means array_slice() preserves the original numeric keys of the array."}

{ ⏎   "answer": "[20, 30]", ⏎   "explanation": "array_slice starts at index 1 and takes 2 elements from the array [10, 20, 30, 40], resulting in [20, 30]." ⏎ }

{"answer": 2, "explanation": "The '+' operator on arrays keeps elements from the left array for duplicate keys, so the result is ['a' => 1, 'b' => 2] which has 2 elements."}

{"answer": "yes", "explanation": "The spread operator in PHP 8.1 and later supports arrays with string keys, merging them and overwriting duplicates with the later array's values."}

{ ⏎   "answer": "no", ⏎   "explanation": "In PHP, it is possible to combine named arguments and argument unpacking in the same function call." ⏎ }

```json ⏎ { ⏎   "answer": "no", ⏎   "explanation": "Anonymous functions (closures) in PHP do not automatically have access to the outer scope's variables unless explicitly passed using the 'use' keyword." ⏎ } ⏎ ```

```json ⏎ {"answer": 3, "explanation": "func_num_args() counts the number of arguments passed to a function, ignoring $a because it is an argument name, not a variable in scope."} ⏎ ```

{ ⏎ "answer": "yes", ⏎ "explanation": "PHP arrow functions can contain a compound statement body enclosed in curly braces, allowing for multiple expressions or control structures." ⏎ }

{"answer": "no", "explanation": "In PHP, arrow functions (the `fn` syntax introduced in PHP 8.0) capture outer variables by value, not by reference, and they do not use the `$this` variable of the enclosing scope."}

{ ⏎   "answer": "yes", ⏎   "explanation": "In PHP, static functions and static closures do not have access to the instance scope ($this)." ⏎ }

{"answer": 5, "explanation": "The closure captures $x by value at the time of creation, so it returns 5 even though $x was later changed to 7."}

```json ⏎ { ⏎   "answer": "yes", ⏎   "explanation": "In weak typing mode, PHP allows type coercion, so the string '5' can be implicitly converted to an integer when passed to an int parameter." ⏎ } ⏎ ```

{"answer": "yes", "explanation": "PHP 8.0 introduced constructor property promotion, which automatically creates a property when declared in the constructor signature."}

{ ⏎ "answer": "final", ⏎ "explanation": "In PHP, the 'final' keyword can be used before a class or method to prevent it from being inherited or overridden." ⏎ }

{"answer": "yes", "explanation": "A final method in PHP cannot be overridden by a subclass."}

{"answer": "no", "explanation": "Private properties are only accessible within the class they are declared in, not in subclasses."}

{ ⏎   "answer": "stdClass", ⏎   "explanation": "Creating an anonymous class in PHP without a name defaults to the stdClass class, and get_class returns the class name as a string." ⏎ }

{ ⏎   "answer": "yes", ⏎   "explanation": "Because private methods are not part of the public inheritance contract, a child class can declare a method with the same name without it overriding the parent's private method and with any visibility." ⏎ }

{"answer": "no", "explanation": "The magic method __get() is called when reading a property that is inaccessible (i.e., it does not exist or is inaccessible due to visibility), not just when it simply does not exist."}

{ ⏎ "answer": "Error", ⏎ "explanation": "In PHP 8.1+, attempting to write to a readonly property throws a readonly property modification Error (a subclass of Error, specifically an \"Error\" type as in \"Error: Cannot modify readonly property...\"), rather than an Exception." ⏎ }

{"answer": "yes", "explanation": "PHP interfaces can declare constants, which are implicitly public and immutable."}

{ ⏎   "answer": "instanceof", ⏎   "explanation": "The 'instanceof' operator checks whether an object is an instance of a class or interface." ⏎ }

{"answer": "yes", "explanation": "PHP interfaces can declare static methods, though they do not have to be implemented in the same way as abstract classes."}

{"answer": "no", "explanation": "The instanceof operator also returns true if the object is an instance of any of the interfaces implemented by its class."}

{"answer": "false", "explanation": "In PHP, interface methods must be declared without a body (unimplemented), whereas traits can have default implementations."}

{"answer": "yes", "explanation": "Abstract methods in PHP can be declared with public or protected visibility, but not private."}

{ ⏎ "answer": 3, ⏎ "explanation": "Foo::cases() returns an array of all enum cases, and the enum defines exactly 3 cases." ⏎ }

{ ⏎   "answer": "yes", ⏎   "explanation": "Traits in PHP support the declaration of constants, which are accessible to any class that uses the trait." ⏎ }

{"answer": "yes", "explanation": "In PHP 8.0 and later, the Throwable interface was introduced as the common ancestor for both Exception and Error classes."}

{"answer": "yes", "explanation": "In PHP, the built-in TypeError class extends RuntimeException, which in turn extends Exception, so a catch (Exception $e) block will catch TypeError."}

{ ⏎ "answer": "no", ⏎ "explanation": "The @ operator only suppresses non-fatal notices, warnings, and deprecations, but it does not suppress exceptions or fatal errors." ⏎ }

{"answer": "DivisionByZeroError", "explanation": "In PHP, the intdiv() function throws a DivisionByZeroError when attempting to divide an integer by zero."}

{"answer": "no", "explanation": "In PHP, a finally block executes regardless of whether an exception was thrown or caught."}

{"answer": "false", "explanation": "An exception thrown inside a finally block will propagate and is not suppressed by the try block's result."}

{"answer": "yes", "explanation": "In PHP, any object instance is truthy when cast to a boolean, so (bool) new Exception('x') evaluates to true (yes)."}

{"answer": "no", "explanation": "Functions registered via register_shutdown_function() run when the script ends, not specifically when exit() is called, which does not necessarily terminate the script execution in all contexts."}

{ ⏎   "answer": "no", ⏎   "explanation": "The use statement is a compile-time aliasing directive that simply rebinds the class name, not a runtime autoload trigger; the class file is loaded only when the class is first actually referenced (e.g., instantiated or used) and PHP's autoloader is registered." ⏎ }

{"answer": "function", "explanation": "In PHP, you use `use function` to import a standalone function, while `use const` is used for constants."}

{ ⏎   "answer": "src/Controller/Api/UserController.php", ⏎   "explanation": "PSR-4 mapping converts backslashes in the class name to directory separators, placing the fully qualified class App\\Controller\\Api\\UserController into src/Controller/Api/UserController.php." ⏎ }

{"answer": "yes", "explanation": "Including vendor/autoload.php typically instantiates a Composer autoloader whose constructor calls spl_autoload_register() to attach the autoload callback to the SPL autoloader."}

{"answer": "yes", "explanation": "__NAMESPACE__ is a compile-time magic constant that expands to the string of the current namespace in which it is used."}

{"answer": "yes", "explanation": "In PHP 5.3 and later, unqualified class names within a namespace are resolved by first checking the current namespace, and only falling back to the global root if the class is not found in the current namespace."}

{ ⏎   "answer": "yes", ⏎   "explanation": "Under PSR-4, each backslash in the fully qualified name maps to a directory separator, and the class name is converted to the corresponding file name, so App\\Model\\User maps to src/Model/User.php." ⏎ }

{ ⏎   "answer": "yes", ⏎   "explanation": "The use statement can be declared inside a function or class method, and the import applies only to the scope where it is declared." ⏎ }

{ ⏎   "answer": "yes", ⏎   "explanation": "In PHP, arrays are value types, meaning assigning an array to another variable creates a copy of the data rather than creating a reference to the original." ⏎ }

{ ⏎   "answer": 2, ⏎   "explanation": "Arrays are passed by value in PHP, so $b is a separate copy and adding 3 to $b does not modify $a." ⏎ }

{"answer": "yes", "explanation": "In PHP, variables declared outside of functions are considered global and must be accessed within a function using the global keyword, the $GLOBALS superglobal array, or by passing them as parameters."}

{"answer": "no", "explanation": "The $GLOBALS superglobal is a reference to the global scope, so unsetting it from within a function permanently removes the variable from the global scope, not just from the current function's local scope."}

{"answer": 6, "explanation": "The function inc modifies $x by reference, incrementing $n from 5 to 6 before echoing it."}

{"answer": "no", "explanation": "In PHP, foreach iterates over a snapshot of the array by default, so modifications to the array during the loop are not visible within that same pass."}

{ ⏎   "answer": "no", ⏎   "explanation": "Static properties belong to the class itself and are shared across all instances, so a change in one object is visible in others." ⏎ }

{ ⏎   "answer": "no", ⏎   "explanation": "PHP casts the boolean value true to the integer 1, which then becomes the numeric string '1' when used as an array key." ⏎ }

{"answer": "yes", "explanation": "Returning a value from a PHP generator makes it accessible via the Generator::getReturn() method."}

{"answer": "no", "explanation": "In PHP, once a generator is fully consumed, it is considered closed and cannot be rewound; rewind() throws a ValueError if called on a generator after it has been exhausted."}

{"answer": "yes", "explanation": "The yield from construct in PHP delegates the iteration of a generator to another generator or iterable, effectively flattening the result."}

```json ⏎ {"answer": "true", "explanation": "Since g() is a generator function, g() creates a Generator object, and get_class() on a Generator object returns the class name \"true\" (which is PHP's internal representation of a Generator object)."} ⏎ ```

{"answer": 3, "explanation": "iterator_to_array converts the yielded values 1, 2, and 3 into an array, resulting in three elements."}

```json ⏎ {"answer": "no", "explanation": "The SplStack class implements a LIFO (Last-In, First-Out) stack, while the SplQueue class implements a FIFO queue."} ⏎ ```

{"answer": "yes", "explanation": "ArrayIterator is a built-in class that implements the Iterator interface, allowing you to wrap an array and iterate over it."}

{"answer": "no", "explanation": "ArrayObject inherits from SplObjectStorage and implements Traversable, so it can be used with foreach."}

{"answer": "yes", "explanation": "The password_hash() function automatically generates and stores the salt, so providing a separate salt is not required."}

{ ⏎   "answer": "no", ⏎   "explanation": "PASSWORD_DEFAULT is currently bcrypt in PHP 8, not md5 with a salt." ⏎ }

{"answer": true, "explanation": "password_verify() returns true when the provided password matches the hash generated by password_hash()."}

{"answer": "no", "explanation": "strip_tags() removes HTML tags and is used for XSS prevention, not SQL injection."}

{"answer": "yes", "explanation": "session_regenerate_id() changes the session ID to make it difficult for an attacker to maintain access to the session, which is a standard method for mitigating session fixation attacks during login."}

{"answer":"php_sapi_name()","explanation":"The function php_sapi_name() returns the name of the SAPI (Server Application Programming Interface) being used, such as \"cli\" or \"fpm-fpm\"."}

{"answer": "yes", "explanation": "session_destroy() deletes the session data from the server, but it does not send a delete instruction to the client's browser to remove the session cookie, leaving the cookie in the browser intact."}

{ ⏎   "answer": "false", ⏎   "explanation": "The $_SESSION array is empty or undefined until session_start() (or session_start() equivalent) is called to initialize the session." ⏎ }

{ ⏎ "answer": "There is no array_find() function in PHP", ⏎ "explanation": "array_find() does not exist in PHP; the closest built-in alternatives are array_search() for value lookup or usort()/array_map() patterns for custom search logic." ⏎ }

{ ⏎ "answer": "yes", ⏎ "explanation": "PHP 8.4 introduced property hooks, allowing you to define get and set logic directly in the property declaration using the { get } and { set } syntax." ⏎ }

{"answer": "no", "explanation": "Asymmetric visibility (e.g., public private(set) string $name) is a PHP 8.4 feature, so the statement that it appeared in PHP 8.4 is correct; however, the prompt asks "True or false?" regarding the statement that it appeared in 8.4, which is true. Wait, let me re-read: The statement is \"Asymmetric visibility... appeared in PHP 8.4.\" This statement is factually TRUE. So the answer to the True/False question should be 'yes' if the statement is true, or 'no' if false. The statement is true, so answer is 'yes'.\n\nCorrection: The question asks if the statement is True or False. The statement \"Asymmetric visibility ... appeared in PHP 8.4\" is a True statement. Therefore, the answer to the question \"True or false?\" is \"yes\" (meaning it is true).\n\nLet me double-check the instruction: \"For a 'True or false?' question, answer is 'yes' or 'no'\". Usually, \"True\" corresponds to \"yes\" and \"False\" to \"no\". Since the statement is true, the answer is yes. ⏎  ⏎ Wait, looking at the previous thought process I was confused. Let's stick to the facts. ⏎ Fact: Asymmetric visibility was introduced in PHP 8.4. ⏎ Statement: Asymmetric visibility appeared in PHP 8.4. ⏎ Is the statement True or False? It is True. ⏎ Answer: yes."}

{ ⏎   "answer": "8.0", ⏎   "explanation": "The NoDiscard attribute was introduced in PHP 8.0 to allow developers to mark return values that must be used." ⏎ }

{ ⏎   "answer": 8.1, ⏎   "explanation": "The pipe operator (|>) for the arrow functions was introduced as a PHP 8.1 feature." ⏎ }

{"answer": "8.1", "explanation": "The clone constructor parameter, which allows passing an array of property values to the clone constructor, was introduced in PHP 8.1."}

{"answer": "7.3", "explanation": "The array_first() and array_last() functions were introduced in PHP 7.3."}

```json ⏎ {"answer": "7.4", "explanation": "RFC Partial Function Application v2 was adopted for PHP 7.4."} ⏎ ```

{"answer": "8.0", "explanation": "The PHP RFC clamp_v2, which introduced the clamp() function, was accepted and implemented in PHP 8.0."}

{"answer": "no", "explanation": "As of the current date in 2025, the "adopted" status of RFC 8508 for Context Managers is not officially confirmed in PHP 8.3/8.4, and the "v2" version is a hypothetical future specification."}

{"answer": "false", "explanation": "RFC Bound-Erased Generic Types was rejected during the PHP 8.4 era (not declined in 2026) and remains not part of PHP's roadmap."}

{"answer": "yes", "explanation": "PHP RFC 9675 (or similar recent proposals) and the broader PHP roadmap have indicated that ZTS will be enabled by default in future PHP versions, with PHP 8.3 already making it more common and PHP 9 expected to make it default by 2026."}

{"answer": "yes", "explanation": "PHP 8.5 does not include parameterized generics, which remain absent from the language as of that version."}

{"answer": "yes", "explanation": "As of November 2026, the latest stable PHP version is indeed 8.5, while PHP 8.6 was not yet released until later in November 2026."}

{ ⏎ "answer": "yes", ⏎ "explanation": "PHP 6 was canceled to prioritize a major rewrite, and development jumped directly from 5.6 to 7.0." ⏎ }

{"answer": "yes", "explanation": "RFC 9080 for the Deprecated Attribute was adopted and the attribute is available as part of PHP 8.2's core language features."}

{"answer": "yes", "explanation": "In clean and onion architectures, the dependency rule states that code can only depend inward (toward the core), meaning inner layers are agnostic to outer layers."}

{ ⏎   "answer": "yes", ⏎   "explanation": "This statement reflects a strict Domain-Driven Design principle where the Domain layer should remain independent of infrastructure frameworks like Doctrine or Symfony." ⏎ }

{ ⏎   "answer": "no", ⏎   "explanation": "Controllers and templates belong to the presentation layer, while use cases belong to the business-logic layer." ⏎ }

{ ⏎   "answer": "Domain", ⏎   "explanation": "In onion architecture, the innermost layer contains the domain model, which is the core of the application and contains no dependencies on other layers." ⏎ }

{ ⏎   "answer": "yes", ⏎   "explanation": "Tools like deptrac and phan are specifically designed to perform static analysis to detect and report architectural layer dependency violations." ⏎ }

{"answer": "yes", "explanation": "It is generally simpler and more practical to inject dependencies like HTTP requests or EntityManagers into an interactor rather than constructing them internally, as this allows for easier testing and loose coupling."}

{"answer": "Repository", "explanation": "The Repository pattern encapsulates the logic needed to obtain data objects from an abstract data source or object pool, hiding the storage mechanism behind an interface."}

{ ⏎   "answer": "yes", ⏎   "explanation": "In clean architecture, domain and use cases are independent of external infrastructure like databases, so swapping a database engine is handled by adapting the outer layer without altering the core." ⏎ }

{"answer": "false", "explanation": "An aggregate in DDD is a cluster of domain objects that share a common identity and can be modified as a single unit, which is conceptually broader and more complex than simply mapping to a database table."}

{"answer": "yes", "explanation": "Value objects are defined by their immutability and equality based on their field values rather than object identity."}

{ ⏎ "answer": "Aggregate Root", ⏎ "explanation": "In Domain-Driven Design, the Aggregate Root serves as the single entry point for all interactions and modifications within an aggregate." ⏎ }

{ ⏎   "answer": "yes", ⏎   "explanation": "In DDD, the repository pattern is designed to manage the lifecycle and persistence of an aggregate, accessing its entities through the root aggregate." ⏎ }

{"answer": "yes", "explanation": "In Domain-Driven Design, ubiquitous language ensures that the code, domain experts, and developers share the same terms and concepts."}

{"answer": "model", "explanation": "The term 'model' itself defines the boundary of consistency within a specific logical framework, where terms retain fixed meanings, unlike outside that framework where the same words may refer to different things."}

{"answer": "no", "explanation": "In DDD, domain models are expected to encapsulate their invariants and behavior, so anemic models are generally considered an anti-pattern rather than the recommended style."}

{"answer": "yes", "explanation": "In Domain-Driven Design, a bounded context defines a logical boundary where a particular domain model is valid and consistent, and the same concept (like 'Customer') can be modeled as a distinct class with different attributes and behaviors in different contexts."}

{ ⏎   "answer": "yes", ⏎   "explanation": "Symfony's DI container uses lazy initialization, meaning services are typically instantiated only when they are first requested or injected." ⏎ }

{ ⏎   "answer": "symfony:routes", ⏎   "explanation": "The Symfony command 'symfony:routes' (or 'console:routes' in older versions) lists all registered routes in the application." ⏎ }

{"answer": "no", "explanation": "Symfony's autowiring feature automatically detects and wires services based on type hints without manual declaration in services.yaml."}

{ ⏎   "answer": "yes", ⏎   "explanation": "Twig compiles templates into PHP classes and caches them on disk to avoid recompiling them on every request." ⏎ }

{ ⏎   "answer": "yes", ⏎   "explanation": "In the Symfony development environment, the container is cached and only rebuilt when tracked files change rather than on every request." ⏎ }

{"answer": "SYMFONY_ENV", "explanation": "The SYMFONY_ENV environment variable is used by Symfony to determine the active application environment, such as dev or prod."}

```json ⏎ { ⏎   "answer": "no", ⏎   "explanation": "Symfony routing requires controller methods to be public so the framework can invoke them externally via the HTTP dispatcher." ⏎ } ⏎ ```

{"answer": "no", "explanation": "In PHP's observer pattern and Symfony's DispatchEvent system, subscribers and listeners are often treated as equivalent, and execution order is typically determined by priority levels rather than the type of registration."}

{"answer": "no", "explanation": "The legacy guard system was removed in Symfony 5.3, and the new Security component using AuthenticatorInterface is the standard in modern Symfony versions like 6.0+."}

{"answer": "isGranted", "explanation": "The isGranted attribute (from the security namespace) checks user permissions/roles on controller methods."}

{"answer": "no", "explanation": "Symfony uses Voter objects (which implement AccessVoterInterface) to check access to specific objects, but 'Voters' is not the specific mechanism name; the method is typically called via a custom AccessChecker or a Voter object directly, though the concept described is partially correct, the term 'Voters' as a mechanism is inaccurate in the context of the question's phrasing."}

{"answer": "yes", "explanation": "Symfony 6+ fully supports and recommends using PHP attributes for validation and Doctrine mapping, while legacy annotation support has been deprecated and removed in recent releases."}

{ ⏎   "answer": "yes", ⏎   "explanation": "Symfony automatically generates and validates CSRF tokens for forms to protect against cross-site request forgery attacks." ⏎ }

{ ⏎   "answer": "yes", ⏎   "explanation": "Symfony always validates user input on the server side to ensure data integrity and security, regardless of client-side HTML5 validation." ⏎ }

{"answer": "symfony maker:form", "explanation": "The 'symfony maker:form' command generates a custom form type class based on a model entity or existing class."}

{ ⏎   "answer": "no", ⏎   "explanation": "Symfony stores only the hashed password in the database and never stores plain-text passwords in the session." ⏎ }

{"answer": "yes", "explanation": "In Symfony, it is common convention to organize bundle configurations in the config/packages directory, often creating a dedicated file for each bundle or topic."}

{"answer": "yes", "explanation": "A common best practice is to commit a .env.example or .env with safe defaults while keeping .env or .env.local with real secrets untracked via .gitignore."}

{"answer":"bin/console debug:container", "explanation":"The debug:container command in Symfony lists the registered services and their aliases in the container."}

{"answer": "yes", "explanation": "The Symfony container is mutable and supports setParameter() to update parameter values at runtime, even after the container has been initialized."}

{ ⏎   "answer": "no", ⏎   "explanation": "In Symfony 3.4 and later, services are private by default and must be marked public to be fetched directly from the container." ⏎ }

{"answer": "no", "explanation": "Bundles in Symfony are optional regarding configuration; they can be registered without a dedicated config file and still function using their default settings or the framework's core configuration."}

{"answer": "no", "explanation": "In Symfony, environment variables are injected into YAML configuration files using the %env(VAR)% syntax only when the environment variable processor is properly configured and the parameter is defined, but the statement as a general rule about all services.yaml injections is misleading since the specific syntax depends on the context and setup; however, the primary reason this is false in a general exam context is that this syntax is used for parameters in general, not exclusively or universally as a standalone fact without context, but more likely, the question is a trick because in Symfony, you typically use %env(VAR)% inside *parameters.yaml* or directly, and it works in services.yaml, so it is actually TRUE. Wait, let me re-read. Symfony *does* allow %env(VAR)% in services.yaml. So why would it be false? Maybe the question implies it's the *only* way or something else. Let's reconsider. Actually, in Symfony, the correct syntax is indeed %env(VAR)%. So the statement is True. Let me check if there's any nuance. Some older versions or specific contexts might use different syntax, but in standard modern Symfony (3.3+), %env(VAR)% is the standard. I will answer True. Wait, the user asked "True or false?". If I answer "yes", it means the statement is true. If I answer "no", it means false. The statement says "Environment variable values are injected into services.yaml using the %env(VAR)% syntax." This is a standard Symfony feature. So the answer should be "yes". Let me double check if there's any trap. Maybe the syntax is %env:VAR%? No, it's %env(VAR)%. Or maybe it requires the parameter to be defined in params.yaml first? Yes, but you can also define it inline in services.yaml. So the statement is generally true. I will go with "yes".", "explanation": "In Symfony, the %env(VAR)% placeholder syntax is the standard method for injecting environment variables into configuration files, including services.yaml."}

{ ⏎   "answer": "APP_DEBUG", ⏎   "explanation": "The APP_DEBUG environment variable, typically set to true in the dev environment, enables debug mode which activates the profiler and Twig debugging features." ⏎ }

{"answer": "yes", "explanation": "In Symfony Messenger, a single message can be handled by multiple handlers registered for the same message class or by using transport options to fan out to multiple consumers."}

{"answer": "no", "explanation": "The sync transport in Symfony Messenger does not queue messages; it synchronously executes the message immediately within the same request cycle, whereas the async transport sends it to a transport that a separate worker consumes."}

{ ⏎   "answer": "bin/console messenger:consume", ⏎   "explanation": "The messenger:consume command is used to start the worker that processes messages from the queue in Symfony Messenger." ⏎ }

{"answer": "yes", "explanation": "Retry strategies are configured within the transport configuration in Symfony Messenger."}

{"answer": "yes", "explanation": "The default serializer used by the Symfony Messenger component is the JSONSerializer."}

{ ⏎   "answer": "no", ⏎   "explanation": "The Symfony Scheduler component is designed to execute arbitrary callbacks or commands, not specifically to produce and dispatch Messenger messages." ⏎ }

{"answer": "doctrine", "explanation": "The Doctrine transport in Symfony Messenger uses database tables managed by Doctrine ORM to persist messages."}

{"answer": "yes", "explanation": "Laravel's Messenger pipeline supports custom middleware that can be inserted at specific positions to run before or after the built-in middleware classes."}

```json ⏎ { ⏎   "answer": "yes", ⏎   "explanation": "Symfony follows a long-term support (LTS) strategy where major versions are released every two years (e.g., Symfony 4.4, 5.4, 6.4) and stable minor releases occur roughly every six months in May and November." ⏎ } ⏎ ```

{ ⏎   "answer": "8.1", ⏎   "explanation": "Symfony 8 requires PHP 8.1 or higher." ⏎ }

{ ⏎   "answer": "no", ⏎   "explanation": "Symfony 7.0 removed support for docblock annotations in favor of attributes, which became mandatory in Symfony 6.0." ⏎ }

{"answer": "yes", "explanation": "AssetMapper is a PHP library that dynamically generates an import map (importmap.php) to manage CSS and JavaScript assets without requiring Node.js or a build tool like webpack."}

{ ⏎ "answer": "yes", ⏎ "explanation": "Symfony 6.4 is a minor release that received standard support and is not designated as a Long-Term Support (LTS) release, unlike versions 6.0, 6.1, 6.2, 6.3, 6.4, and 6.5." ⏎ }

{"answer": "no", "explanation": "Major Symfony releases remove the deprecations introduced in the previous major branch, so you must fix them before upgrading."}

{"answer": "yes", "explanation": "Symfony provides an UPGRADE guide for each major release to document breaking changes and new features."}

{"answer": "Webpack Meta", "explanation": "The Webpack Meta component of Symfony is specifically designed to manage assets and generate or manage an importmap without the need for a build step like Node.js or Webpack."}

{"answer": "yes", "explanation": "Symfony 8.2 is scheduled to be released in November 2026 and is expected to be available by that date."}

{"answer": "no", "explanation": "The statement is factually incorrect because Symfony follows a six-month release cycle where the major version number always matches the year's first two digits (e.g., 2.4, 4.2, 5.2), not a sequential versioning scheme like 8.2."}

{"answer": "8.2", "explanation": "Symfony 8.1 is followed by 8.2 in the minor release sequence."}

{"answer": "no", "explanation": "Symfony does not currently release major versions with the 2.x or 3.x numbering for its latest stable branch, and 8.2 is not an existing or announced major release version."}

{ ⏎   "answer": "no", ⏎   "explanation": "While minor updates within a major branch preserve backward compatibility, moving from 8.1 to 8.2 crosses a major version boundary which can introduce breaking changes requiring code modifications." ⏎ }

{ ⏎   "answer": "8.3", ⏎   "explanation": "Symfony 8.3 is the last minor version released in the 8.x branch before the release of Symfony 9.0." ⏎ }

{"answer": "yes", "explanation": "Symfony 8.x is the first major release to drop support for PHP 8.3 and 8.4, making PHP 8.5 the minimum required version."}

{"answer": "yes", "explanation": "Symfony follows a policy where deprecations introduced in a major version remain until the next major release, meaning 8.x deprecations will persist until Symfony 9.0."}

{"answer": "no", "explanation": "Twig does not allow calling arbitrary PHP code directly inside its expressions; it provides a restricted set of functions and operators designed to be safe and sandboxed."}

{ ⏎   "answer": "yes", ⏎   "explanation": "By default, Twig has auto-escaping enabled, which safely encodes variables before printing them to prevent XSS attacks." ⏎ }

{ ⏎   "answer": "yes", ⏎   "explanation": "The Twig |e (or |escape) filter escapes a string to prevent XSS by converting special characters to HTML entities by default." ⏎ }

{ ⏎   "answer": "locale", ⏎   "explanation": "The `locale` filter in twig/intl-extra formats a number or date according to a specific locale." ⏎ }

{ ⏎ "answer": "no", ⏎ "explanation": "The |raw filter does not exist in PHP's standard native filter set; it is a custom Laravel helper used in Blade templates, not a PHP filter." ⏎ }

{"answer": "yes", "explanation": "{{ }} outputs the result of an expression, while {% %} executes template tags like if, for, and set."}

{"answer": "yes", "explanation": "While values typically come from the controller, Twig does allow you to declare variables inside a template using the `set` tag (e.g., `{% set x = 10 %}`)."}

{"answer": "dump()", "explanation": "The dump() function in Twig is used to output the debug structure of a variable, similar to var_dump in PHP."}

{"answer": "yes", "explanation": "Bootstrap is a frontend library providing UI components and utilities, while SPA frameworks like React or Angular handle client-side routing and state management."}

{"answer": "container-fluid", "explanation": "The .container-fluid class provides a responsive container that expands to fill the viewport width with a fixed max-width at each breakpoint."}

{"answer": "no", "explanation": "Bootstrap 3 and later use a 12-column grid system, and the modern versions have transitioned from CSS floats to CSS Grid and Flexbox."}

{"answer": "no", "explanation": "The base breakpoint xs is not used as an infix, so there are only four named breakpoints (sm, md, lg, xl/xxl depending on version)."}

```json ⏎ { ⏎   "answer": "yes", ⏎   "explanation": "In utilities like .mt-3, the suffix number corresponds to a multiple of the configured $spacer value from the spacing scale." ⏎ } ⏎ ```

{"answer": "data-bs-toggle", "explanation": "The data-bs-toggle attribute is used in Bootstrap 5 to enable interactive components like dropdowns on an element."}

{"answer": "yes", "explanation": "Bootstrap 5 removed its dependency on jQuery and uses vanilla JavaScript along with its own custom event system to drive its components."}

{"answer": "yes", "explanation": "In Bootstrap 5, dark mode is enabled by adding the 'dark' class to the html or body element."}

{"answer": "no", "explanation": "Doctrine ORM does not create database tables automatically; you must explicitly use the SchemaTool or migrations to create tables from the entity metadata."}

{"answer": "persist()", "explanation": "The EntityManager::persist() method puts a new object into the managed state (the persistent lifecycle) without issuing SQL until flush() is called."}

{"answer": "yes", "explanation": "The EntityManager::merge() method in Doctrine ORM 3 makes the passed entity managed by the EntityManager."}

{ ⏎   "answer": "yes", ⏎   "explanation": "DQL (Domain Query Language) is an abstract language that operates on object-oriented domain models (entities and their fields), which is then translated by the persistence framework into SQL. ⏎ }

{ ⏎   "answer": "null", ⏎   "explanation": "When no matching record is found, the find method in Doctrine's ObjectRepository interface returns null by default." ⏎ }

{"answer": "false", "explanation": "Symfony does not automatically call flush at the end of every request; you must explicitly call it or configure the ORM to handle persistence as needed."}

{"answer": "yes", "explanation": "In Doctrine's Unit of Work, modifications to an already persisted entity are automatically detected, so calling flush() is sufficient to commit the changes without an explicit persist()."}

```json ⏎ { ⏎   "answer": "yes", ⏎   "explanation": "In Doctrine ORM, remove() is a method that marks an entity for deletion and executes the DELETE statement immediately without needing a flush(). ⏎ " ⏎ } ⏎ ```

{"answer": "no", "explanation": "PostgreSQL's MVCC allows readers and writers to operate concurrently without blocking each other, meaning readers do not block writers and vice versa."}

{"answer": "EXPLAIN", "explanation": "The EXPLAIN command in SQL returns the execution plan of a query without actually running it."}

{"answer": "yes", "explanation": "In PostgreSQL, the SERIAL data type is syntactic sugar that creates a hidden sequence and uses an identity-like default mechanism, making it effectively equivalent to the explicit GENERATED AS IDENTITY column feature."}

{"answer": "yes", "explanation": "In PostgreSQL, multiple rows with NULL values in a column are allowed to satisfy a UNIQUE constraint by default because NULL is considered not equal to any value, including itself."}

{"answer": "string_agg", "explanation": "The string_agg() function is a PostgreSQL aggregate function used to concatenate strings, allowing an optional second argument to specify a custom separator between the concatenated values."}

{"answer": "yes", "explanation": "A plain VACUUM command in PostgreSQL reclaims storage space used by dead tuples and returns that space to the operating system."}

{"answer": "PARTITION BY", "explanation": "The PARTITION BY clause is used in window function definitions to divide the result set of a query into groups called partitions over which the window function is calculated."}

{"answer": "yes", "explanation": "The READ COMMITTED isolation level prevents non-repeatable reads by ensuring that each statement in a transaction re-reads all data and that the result of repeated reads is consistent with the most recent committed version at the time of the read."}

{"answer": "yes", "explanation": "In PostgreSQL, each individual SQL statement is executed within its own implicit transaction by default unless an explicit transaction block is initiated."}

{"answer": "COMMIT", "explanation": "The COMMIT command is the SQL statement used to save all changes made within a transaction to the database."}

{ ⏎   "answer": "yes", ⏎   "explanation": "Indexes speed up SELECT, UPDATE, and DELETE operations when the WHERE clause uses the indexed column, as they allow faster row location and filtering." ⏎ }

{ ⏎   "answer": "yes", ⏎   "explanation": "SAVEPOINT creates a named checkpoint within a transaction, allowing you to roll back only the most recent statements to that point without aborting the entire transaction." ⏎ }

```json ⏎ {"answer": "yes", "explanation": "EXPLAIN ANALYZE actually executes the query to gather real performance metrics while displaying the query plan."} ⏎ ```

{"answer": "pgvector", "explanation": "pgvector is the PostgreSQL extension that adds vector data types and supports indexing for vector similarity searches, commonly used for embedding-based AI applications."}

{"answer": "yes", "explanation": "Partial indexes only store data for rows that satisfy the specified WHERE condition."}

{ ⏎ "answer": "no", ⏎ "explanation": "The SERIALIZABLE level in PostgreSQL is implemented using snapshot isolation and detecting conflicts, not by locking the rows that a transaction reads." ⏎ }

{ ⏎   "answer": "yes", ⏎   "explanation": "HTTP status 201 indicates that the request was successful and a new resource has been created." ⏎ }

{ ⏎   "answer": 204, ⏎   "explanation": "204 No Content indicates a successful request with no response body." ⏎ }

{"answer": "yes", "explanation": "The HTTP specification defines the DELETE method as idempotent, meaning that repeated identical requests have the same effect as a single request."}

{"answer": "no", "explanation": "The Access-Control-Allow-Origin header is actually sent by the server to indicate whether it will accept requests from a specific origin."}

{"answer": "yes", "explanation": "HTTP 429 is specifically designated for indicating that a client has exceeded the allowed rate of requests."}

{"answer": "no", "explanation": "4xx codes indicate client errors, while 5xx codes indicate server errors."}

{"answer": "Content-Type", "explanation": "The Content-Type header specifies the media type of the request or response body."}

```json ⏎ { ⏎   "answer": "false", ⏎   "explanation": "RFC 5789 explicitly defines PATCH as an idempotent method." ⏎ } ⏎ ```

{ ⏎   "answer": "false", ⏎   "explanation": "Using a standard string comparison (==) is not sufficient for password verification because it is not constant-time and is susceptible to timing attacks; you must use a dedicated timing-safe function like hash_equals()." ⏎ }

{"answer": "yes", "explanation": "CSRF tokens are typically generated by the server, associated with the user's session, and validated server-side on state-changing requests to prevent cross-site request forgery."}

{"answer":"Content-Security-Policy","explanation":"The Content-Security-Policy HTTP header is used to specify the security rules that a web server enforces for the loading of a webpage."}

{"answer": "no", "explanation": "OAuth 2.0 is primarily an authorization protocol for granting access to resources on behalf of a user, and the access token represents delegated permissions rather than identifying the user's identity."}

{"answer": "false", "explanation": "XSS is prevented by output encoding at the point of use, not by server-side input validation before storing data."}

{ ⏎   "answer": "code", ⏎   "explanation": "In the OAuth 2.0 authorization code flow, the authorization server redirects the user's browser to the redirect_uri with the authorization code parameter, which is then exchanged for an access token." ⏎ }

{"answer": "yes", "explanation": "Refresh tokens are designed with a longer expiration than access tokens and are used to securely request a new access token without requiring the user to re-authenticate."}

{"answer": "no", "explanation": "Password salts are typically stored in plain text alongside the hash (or in the database row) to enable verification; it is the password and the hash that must be kept secret."}

{"answer": "no", "explanation": "PHPUnit test methods must be declared in classes that extend PHPUnit\\Framework\\TestCase to be recognized and executed as tests."}

{ ⏎   "answer": "no", ⏎   "explanation": "setUp() (or setUpBeforeClass in newer contexts) runs before each individual test method, not just once per class." ⏎ }

{"answer": "no", "explanation": "A data provider in PHP's PHPUnit lets a test run with multiple sets of arguments, not just one."}

{ ⏎   "answer": "expectException()", ⏎   "explanation": "expectException() is the PHPUnit method used to declare an expectation for a specific exception class to be thrown during a test." ⏎ }

{ ⏎   "answer": "no", ⏎   "explanation": "It is the opposite: a mock verifies which methods were called on it, while a stub simply returns predefined data without verifying calls." ⏎ }

{ ⏎   "answer": "yes", ⏎   "explanation": "PHPUnit 10 deprecated annotations in favor of PHP 8 attributes, making #[DataProvider] the recommended approach." ⏎ }

{"answer": "no", "explanation": "PHPUnit provides mechanisms like setUp/tearDown and fixtures, but it does not have a built-in feature to make one test method depend on the output of another test method."}

{"answer": "--randomize", "explanation": "The --randomize flag shuffles the test cases before execution."}

{ ⏎   "answer": "3-4", ⏎   "explanation": "intdiv(7,2) is 3 and intdiv(-7,2) truncates toward zero to -3, so the output is the string \"3-4\"." ⏎ }

{ ⏎   "answer": -9, ⏎   "explanation": "The unary minus operator binds more tightly than the exponentiation operator in PHP, so the expression is evaluated as (-3) ** 2, which equals -9." ⏎ }

{ ⏎   "answer": "true", ⏎   "explanation": "In PHP, the string '1e1' is numerically equal to 10, so the loose comparison '1e1' == '10' evaluates to true, causing the ternary operator to output 'true'." ⏎ }

{"answer": "other", "explanation": "PHP switch cases use loose comparison, so the string 'a' is not equal to 0, causing the default case to execute."}

{"answer": "1bc", "explanation": "strtr with an array performs multiple search-and-replace operations where 'a' is replaced by '1' first, leaving '1bc'."}

{"answer": "[hello]", "explanation": "substr('hello', -10) returns the whole string 'hello' because the length -10 is longer than the string, so it prepends '[' and appends ']'."}

{ ⏎   "answer": "k,n", ⏎   "explanation": "The + operator keeps existing keys from the left array and adds only new keys from the right array, so the keys are 'k' and 'n'." ⏎ }

{"answer": "xzy", "explanation": "The code sorts the array by the third element (values 2,1,2) using a stable sort, then extracts the second element from each row."}

{ ⏎   "answer": "4", ⏎   "explanation": "The spread operator with named arguments unpacks 'a' and 'b' in the order they are defined in the function signature, resulting in f(5, 1) which outputs 4." ⏎ }

{"answer": 3, "explanation": "The function g() is bound to the P object instance at the time it is called, and the closure captures the object, so even after $p is set to null, the object remains alive and g() returns the value of $v, which is 3."}

```json ⏎ { ⏎   "answer": "B", ⏎   "explanation": "static::class refers to the late static binding, which returns the class name where the method was actually called from, which is B." ⏎ } ⏎ ```

{"answer": 10, "explanation": "PHP 8.5 introduced property hooks, so the setter doubles the value to 10 before storing it."}

{"answer": "BA", "explanation": "The `TB::f insteadof TA` conflict resolution makes `f()` from trait `TB` take precedence, returning 'B', and `TA::f` is aliased as `g()` returning 'A'."}

{ ⏎   "answer": 1, ⏎   "explanation": "Static properties declared in a trait are shared across all classes that use it, so assigning CX::$n also updates CY::$n." ⏎ }

{"answer":"1","explanation":"In PHP, a return statement in a try block is executed before any finally block, so the function returns 1."}

{ ⏎   "answer": "second", ⏎   "explanation": "The RuntimeException is caught by the finally block, which throws a LogicException that propagates out of the inner try-finally and is caught by the outer catch block, echoing 'second'." ⏎ }

{"answer":"App\\Foo|Baz","explanation":"The alias resolves to App\\Foo, while the global name is Baz."}

```json ⏎ { ⏎   "answer": "yes", ⏎   "explanation": "class_exists('Foo') returns false, and class_exists('Ns\\Foo') returns true, producing the concatenated string 'yes'." ⏎ } ⏎ ```

```json ⏎ {"answer": "1,2,99", "explanation": "The foreach loop with `&$v` makes $v a reference to each element of $a, and after the loop $v still references the last element, so assigning $v = 99 changes the third element of the array."} ⏎ ```

{"answer": 3, "explanation": "The static variable is shared between all instances of A and B, so the first two calls return 1 and 2, and the third call returns 3."}

{"answer": "11", "explanation": "The initial send(10) executes the generator up to the return statement, causing $x to be 10 and returning 11."}

{"answer":"1,2", "explanation":"yield from forwards the yielded values of the inner generator to outer, so only 1 and 2 are yielded before the inner's return value is ignored by outer's subsequent yield."}

{"answer": "no yes", "explanation": "The first call returns false because the password is already hashed with cost 4, while the second returns true because the desired cost is higher than the existing one."}

```json ⏎ {"answer": "strict-out", "explanation": "E_ALL is 32767, which is not a multiple of 2048, so (E_ALL & 2048) is not 0, thus the expression evaluates to 'strict-out'."} ⏎ ```

{"answer":"mapped","explanation":"Symfony normalizes the HTTP header name, so get('X-Token') returns the value 'abc' set as HTTP_X_TOKEN."}

{ ⏎   "answer": "CBA", ⏎   "explanation": "Listeners are called in descending order of their priority (default is 0), so C (5), B (10), then A (0) append to $out." ⏎ }

{ ⏎   "answer": "same", ⏎   "explanation": "Doctrine ORM maintains a First Level Cache in the EntityManager, so both find() calls for the same identifier return the same persistent object instance." ⏎ }

```json ⏎ { ⏎   "answer": 0, ⏎   "explanation": "The entity is persisted and then removed before the flush, so Doctrine does not execute an INSERT and the table remains empty." ⏎ } ⏎ ```

{"answer": 1, "explanation": "In PostgreSQL, COUNT(x) counts non-NULL values in column x, so with rows 1 and NULL it returns 1."}

{"answer": "10,30,60", "explanation": "The window function sums x cumulatively (10, 30, 60) and string_agg joins them in that order."}

{"answer": "M1M2", "explanation": "The middleware chain executes in the order given, so M1 echoes first, then M2, producing the concatenated string M1M2."}

{ ⏎   "answer": 11, ⏎   "explanation": "HandlersLocator by default calls all registered handlers for a message type in the order they are provided, so both the first handler ($n += 1) and the second handler ($n += 10) execute, resulting in $n = 11." ⏎ }

{"answer": 1, "explanation": "ON CONFLICT DO NOTHING suppresses the second duplicate insert, leaving one row in t."}

{ ⏎   "answer": 2, ⏎   "explanation": "A UNIQUE constraint that is DEFERRABLE INITIALLY DEFERRED is checked only at the end of the transaction, so both inserts succeed." ⏎ }

{"answer": 6, "explanation": "The --filter test_sum matches both test_sum and test_sum_abs, and each has 3 data provider entries."}

```json ⏎ { ⏎   "answer": "2, 1", ⏎   "explanation": "The @DataProvider provides two datasets ([1] and [-1]), so two test cases are executed. The first dataset ($x = 1) passes because 1 > 0, while the second dataset ($x = -1) fails because -1 > 0 is false." ⏎ } ⏎ ```

{"answer": "POST", "explanation": "The -d flag in curl sends data in the body, which by default triggers the HTTP POST method when no other method is specified."}

{"answer":"GET","explanation":"The -G flag tells curl to use GET and put the data in the query string instead of the request body."}

{"answer": "invalid_client", "explanation": "Per RFC 6749 Section 5.2, if the client cannot be identified or is not registered, the authorization server MUST return the error 'invalid_client'."}

{"answer": "fragment", "explanation": "In the implicit grant flow, the authorization server passes the access token in the fragment part of the response to the redirect URI."}

{ ⏎   "answer": 6, ⏎   "explanation": "false is not null, so default(2) does not replace it, and false is coerced to the number 0, making the result 0 * 3 = 6." ⏎ }

{ ⏎ "answer": "Twig\\TwigRuntimeException", ⏎ "explanation": "In Twig, the concatenation operator ~ has lower precedence than arithmetic operators, so the expression is parsed as 'a' ~ (1 + 2), resulting in '3' and no exception being thrown." ⏎ }

{ ⏎   "answer": "1", ⏎   "explanation": "The empty string '' fails the NotBlank constraint, so validate() returns one Violation and count() outputs 1." ⏎ }

{ ⏎   "answer": "invalid", ⏎   "explanation": "A newly created form instance is considered invalid by default because it has no bound data or errors to report." ⏎ }

{"answer": "same", "explanation": "After compiling the container, the service 'a' is resolved into a single object instance and stored in the container, so subsequent calls to get('a') return the exact same object with the same spl_object_id."}

```json ⏎ {"answer": "hi Bob", "explanation": "Symfony's ContainerBuilder resolves %name% to 'Bob' in %greeting%, then %greeting% to 'hi Bob' in %message%, after the % character is escaped as %%."} ⏎ ```

{ ⏎   "answer": "776px", ⏎   "explanation": "In Bootstrap 5.3, the .container's max-width at the 992px breakpoint is defined as 776px." ⏎ }

{"answer": "text-primary", "explanation": "In CSS and Bootstrap's class-based styling, when multiple text color classes are applied to the same element, the last one in the class list generally takes precedence, making text-primary the winning utility."}

{"answer": 2, "explanation": "The class is in the Domain layer and uses Application (PlaceOrder) and Infrastructure (Db), violating the rules that Domain must only reference Domain and that Infrastructure cannot reference Domain."}

{ ⏎   "answer": "2", ⏎   "explanation": "The Domain class depends on two Infrastructure classes (Db and Logger), which are violations of the rule that Domain must only depend on Domain." ⏎ }

{"answer": "10,15", "explanation": "The Money object uses a readonly public property, and the add method creates a new Money instance without modifying the original, so $a->amount is 10 and $c->amount is 15."}

{"answer": 1, "explanation": "The remove() method checks that the order has exactly one item and throws an exception, so the item is never removed and count() returns 1."}

{ ⏎   "answer": "hi", ⏎   "explanation": "The code creates a new C instance and calls its hi() method, which returns the string 'hi', so echo outputs hi." ⏎ }

```json ⏎ { ⏎     "answer": "yes\nno", ⏎     "explanation": "Initially, the lazy object is uninitialized and then becomes initialized after property access." ⏎ } ⏎ ```

{ ⏎   "answer": "no", ⏎   "explanation": "Symfony 8.1 removes the legacy Security Guard classes that were deprecated in 5.3 and removed in 7.0, so AbstractGuardAuthenticator no longer exists." ⏎ }

{"answer": "no\n", "explanation": "The AnnotationClassLoader class was removed in Symfony 7, so both class_exists checks return false in 8.1, outputting \"no\" followed by a newline from the first echo."}